drivers/input/misc/ati_remote2.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ati_remote2 - ATI/Philips USB RF remote driver
   4  *
   5  * Copyright (C) 2005-2008 Ville Syrjala <syrjala@sci.fi>
   6  * Copyright (C) 2007-2008 Peter Stokes <linux@dadeos.co.uk>
   7  */
   8
   9 #include <linux/usb/input.h>
  10 #include <linux/slab.h>
  11 #include <linux/module.h>
  12
  13 #define DRIVER_DESC    "ATI/Philips USB RF remote driver"
  14
  15 MODULE_DESCRIPTION(DRIVER_DESC);
  16 MODULE_AUTHOR("Ville Syrjala <syrjala@sci.fi>");
  17 MODULE_LICENSE("GPL");
  18
  19 /*
  20  * ATI Remote Wonder II Channel Configuration
  21  *
  22  * The remote control can be assigned one of sixteen "channels" in order to facilitate
  23  * the use of multiple remote controls within range of each other.
  24  * A remote's "channel" may be altered by pressing and holding the "PC" button for
  25  * approximately 3 seconds, after which the button will slowly flash the count of the
  26  * currently configured "channel", using the numeric keypad enter a number between 1 and
  27  * 16 and then press the "PC" button again, the button will slowly flash the count of the
  28  * newly configured "channel".
  29  */
  30
  31 enum {
  32         ATI_REMOTE2_MAX_CHANNEL_MASK = 0xFFFF,
  33         ATI_REMOTE2_MAX_MODE_MASK = 0x1F,
  34 };
  35
  36 static int ati_remote2_set_mask(const char *val,
  37                                 const struct kernel_param *kp,
  38                                 unsigned int max)
  39 {
  40         unsigned int mask;
  41         int ret;
  42
  43         if (!val)
  44                 return -EINVAL;
  45
  46         ret = kstrtouint(val, 0, &mask);
  47         if (ret)
  48                 return ret;
  49
  50         if (mask & ~max)
  51                 return -EINVAL;
  52
  53         *(unsigned int *)kp->arg = mask;
  54
  55         return 0;
  56 }
  57
  58 static int ati_remote2_set_channel_mask(const char *val,
  59                                         const struct kernel_param *kp)
  60 {
  61         pr_debug("%s()\n", __func__);
  62
  63         return ati_remote2_set_mask(val, kp, ATI_REMOTE2_MAX_CHANNEL_MASK);
  64 }
  65
  66 static int ati_remote2_get_channel_mask(char *buffer,
  67                                         const struct kernel_param *kp)
  68 {
  69         pr_debug("%s()\n", __func__);
  70
  71         return sprintf(buffer, "0x%04x", *(unsigned int *)kp->arg);
  72 }
  73
  74 static int ati_remote2_set_mode_mask(const char *val,
  75                                      const struct kernel_param *kp)
  76 {
  77         pr_debug("%s()\n", __func__);
  78
  79         return ati_remote2_set_mask(val, kp, ATI_REMOTE2_MAX_MODE_MASK);
  80 }
  81
  82 static int ati_remote2_get_mode_mask(char *buffer,
  83                                      const struct kernel_param *kp)
  84 {
  85         pr_debug("%s()\n", __func__);
  86
  87         return sprintf(buffer, "0x%02x", *(unsigned int *)kp->arg);
  88 }
  89
  90 static unsigned int channel_mask = ATI_REMOTE2_MAX_CHANNEL_MASK;
  91 #define param_check_channel_mask(name, p) __param_check(name, p, unsigned int)
  92 static const struct kernel_param_ops param_ops_channel_mask = {
  93         .set = ati_remote2_set_channel_mask,
  94         .get = ati_remote2_get_channel_mask,
  95 };
  96 module_param(channel_mask, channel_mask, 0644);
  97 MODULE_PARM_DESC(channel_mask, "Bitmask of channels to accept <15:Channel16>...<1:Channel2><0:Channel1>");
  98
  99 static unsigned int mode_mask = ATI_REMOTE2_MAX_MODE_MASK;
 100 #define param_check_mode_mask(name, p) __param_check(name, p, unsigned int)
 101 static const struct kernel_param_ops param_ops_mode_mask = {
 102         .set = ati_remote2_set_mode_mask,
 103         .get = ati_remote2_get_mode_mask,
 104 };
 105 module_param(mode_mask, mode_mask, 0644);
 106 MODULE_PARM_DESC(mode_mask, "Bitmask of modes to accept <4:PC><3:AUX4><2:AUX3><1:AUX2><0:AUX1>");
 107
 108 static const struct usb_device_id ati_remote2_id_table[] = {
 109         { USB_DEVICE(0x0471, 0x0602) }, /* ATI Remote Wonder II */
 110         { }
 111 };
 112 MODULE_DEVICE_TABLE(usb, ati_remote2_id_table);
 113
 114 static DEFINE_MUTEX(ati_remote2_mutex);
 115
 116 enum {
 117         ATI_REMOTE2_OPENED = 0x1,
 118         ATI_REMOTE2_SUSPENDED = 0x2,
 119 };
 120
 121 enum {
 122         ATI_REMOTE2_AUX1,
 123         ATI_REMOTE2_AUX2,
 124         ATI_REMOTE2_AUX3,
 125         ATI_REMOTE2_AUX4,
 126         ATI_REMOTE2_PC,
 127         ATI_REMOTE2_MODES,
 128 };
 129
 130 static const struct {
 131         u8  hw_code;
 132         u16 keycode;
 133 } ati_remote2_key_table[] = {
 134         { 0x00, KEY_0 },
 135         { 0x01, KEY_1 },
 136         { 0x02, KEY_2 },
 137         { 0x03, KEY_3 },
 138         { 0x04, KEY_4 },
 139         { 0x05, KEY_5 },
 140         { 0x06, KEY_6 },
 141         { 0x07, KEY_7 },
 142         { 0x08, KEY_8 },
 143         { 0x09, KEY_9 },
 144         { 0x0c, KEY_POWER },
 145         { 0x0d, KEY_MUTE },
 146         { 0x10, KEY_VOLUMEUP },
 147         { 0x11, KEY_VOLUMEDOWN },
 148         { 0x20, KEY_CHANNELUP },
 149         { 0x21, KEY_CHANNELDOWN },
 150         { 0x28, KEY_FORWARD },
 151         { 0x29, KEY_REWIND },
 152         { 0x2c, KEY_PLAY },
 153         { 0x30, KEY_PAUSE },
 154         { 0x31, KEY_STOP },
 155         { 0x37, KEY_RECORD },
 156         { 0x38, KEY_DVD },
 157         { 0x39, KEY_TV },
 158         { 0x3f, KEY_PROG1 }, /* AUX1-AUX4 and PC */
 159         { 0x54, KEY_MENU },
 160         { 0x58, KEY_UP },
 161         { 0x59, KEY_DOWN },
 162         { 0x5a, KEY_LEFT },
 163         { 0x5b, KEY_RIGHT },
 164         { 0x5c, KEY_OK },
 165         { 0x78, KEY_A },
 166         { 0x79, KEY_B },
 167         { 0x7a, KEY_C },
 168         { 0x7b, KEY_D },
 169         { 0x7c, KEY_E },
 170         { 0x7d, KEY_F },
 171         { 0x82, KEY_ENTER },
 172         { 0x8e, KEY_VENDOR },
 173         { 0x96, KEY_COFFEE },
 174         { 0xa9, BTN_LEFT },
 175         { 0xaa, BTN_RIGHT },
 176         { 0xbe, KEY_QUESTION },
 177         { 0xd0, KEY_EDIT },
 178         { 0xd5, KEY_FRONT },
 179         { 0xf9, KEY_INFO },
 180 };
 181
 182 struct ati_remote2 {
 183         struct input_dev *idev;
 184         struct usb_device *udev;
 185
 186         struct usb_interface *intf[2];
 187         struct usb_endpoint_descriptor *ep[2];
 188         struct urb *urb[2];
 189         void *buf[2];
 190         dma_addr_t buf_dma[2];
 191
 192         unsigned long jiffies;
 193         int mode;
 194
 195         char name[64];
 196         char phys[64];
 197
 198         /* Each mode (AUX1-AUX4 and PC) can have an independent keymap. */
 199         u16 keycode[ATI_REMOTE2_MODES][ARRAY_SIZE(ati_remote2_key_table)];
 200
 201         unsigned int flags;
 202
 203         unsigned int channel_mask;
 204         unsigned int mode_mask;
 205 };
 206
 207 static int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id);
 208 static void ati_remote2_disconnect(struct usb_interface *interface);
 209 static int ati_remote2_suspend(struct usb_interface *interface, pm_message_t message);
 210 static int ati_remote2_resume(struct usb_interface *interface);
 211 static int ati_remote2_reset_resume(struct usb_interface *interface);
 212 static int ati_remote2_pre_reset(struct usb_interface *interface);
 213 static int ati_remote2_post_reset(struct usb_interface *interface);
 214
 215 static struct usb_driver ati_remote2_driver = {
 216         .name       = "ati_remote2",
 217         .probe      = ati_remote2_probe,
 218         .disconnect = ati_remote2_disconnect,
 219         .id_table   = ati_remote2_id_table,
 220         .suspend    = ati_remote2_suspend,
 221         .resume     = ati_remote2_resume,
 222         .reset_resume = ati_remote2_reset_resume,
 223         .pre_reset  = ati_remote2_pre_reset,
 224         .post_reset = ati_remote2_post_reset,
 225         .supports_autosuspend = 1,
 226 };
 227
 228 static int ati_remote2_submit_urbs(struct ati_remote2 *ar2)
 229 {
 230         int r;
 231
 232         r = usb_submit_urb(ar2->urb[0], GFP_KERNEL);
 233         if (r) {
 234                 dev_err(&ar2->intf[0]->dev,
 235                         "%s(): usb_submit_urb() = %d\n", __func__, r);
 236                 return r;
 237         }
 238         r = usb_submit_urb(ar2->urb[1], GFP_KERNEL);
 239         if (r) {
 240                 usb_kill_urb(ar2->urb[0]);
 241                 dev_err(&ar2->intf[1]->dev,
 242                         "%s(): usb_submit_urb() = %d\n", __func__, r);
 243                 return r;
 244         }
 245
 246         return 0;
 247 }
 248
 249 static void ati_remote2_kill_urbs(struct ati_remote2 *ar2)
 250 {
 251         usb_kill_urb(ar2->urb[1]);
 252         usb_kill_urb(ar2->urb[0]);
 253 }
 254
 255 static int ati_remote2_open(struct input_dev *idev)
 256 {
 257         struct ati_remote2 *ar2 = input_get_drvdata(idev);
 258         int r;
 259
 260         dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 261
 262         r = usb_autopm_get_interface(ar2->intf[0]);
 263         if (r) {
 264                 dev_err(&ar2->intf[0]->dev,
 265                         "%s(): usb_autopm_get_interface() = %d\n", __func__, r);
 266                 goto fail1;
 267         }
 268
 269         mutex_lock(&ati_remote2_mutex);
 270
 271         if (!(ar2->flags & ATI_REMOTE2_SUSPENDED)) {
 272                 r = ati_remote2_submit_urbs(ar2);
 273                 if (r)
 274                         goto fail2;
 275         }
 276
 277         ar2->flags |= ATI_REMOTE2_OPENED;
 278
 279         mutex_unlock(&ati_remote2_mutex);
 280
 281         usb_autopm_put_interface(ar2->intf[0]);
 282
 283         return 0;
 284
 285  fail2:
 286         mutex_unlock(&ati_remote2_mutex);
 287         usb_autopm_put_interface(ar2->intf[0]);
 288  fail1:
 289         return r;
 290 }
 291
 292 static void ati_remote2_close(struct input_dev *idev)
 293 {
 294         struct ati_remote2 *ar2 = input_get_drvdata(idev);
 295
 296         dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 297
 298         mutex_lock(&ati_remote2_mutex);
 299
 300         if (!(ar2->flags & ATI_REMOTE2_SUSPENDED))
 301                 ati_remote2_kill_urbs(ar2);
 302
 303         ar2->flags &= ~ATI_REMOTE2_OPENED;
 304
 305         mutex_unlock(&ati_remote2_mutex);
 306 }
 307
 308 static void ati_remote2_input_mouse(struct ati_remote2 *ar2)
 309 {
 310         struct input_dev *idev = ar2->idev;
 311         u8 *data = ar2->buf[0];
 312         int channel, mode;
 313
 314         channel = data[0] >> 4;
 315
 316         if (!((1 << channel) & ar2->channel_mask))
 317                 return;
 318
 319         mode = data[0] & 0x0F;
 320
 321         if (mode > ATI_REMOTE2_PC) {
 322                 dev_err(&ar2->intf[0]->dev,
 323                         "Unknown mode byte (%02x %02x %02x %02x)\n",
 324                         data[3], data[2], data[1], data[0]);
 325                 return;
 326         }
 327
 328         if (!((1 << mode) & ar2->mode_mask))
 329                 return;
 330
 331         input_event(idev, EV_REL, REL_X, (s8) data[1]);
 332         input_event(idev, EV_REL, REL_Y, (s8) data[2]);
 333         input_sync(idev);
 334 }
 335
 336 static int ati_remote2_lookup(unsigned int hw_code)
 337 {
 338         int i;
 339
 340         for (i = 0; i < ARRAY_SIZE(ati_remote2_key_table); i++)
 341                 if (ati_remote2_key_table[i].hw_code == hw_code)
 342                         return i;
 343
 344         return -1;
 345 }
 346
 347 static void ati_remote2_input_key(struct ati_remote2 *ar2)
 348 {
 349         struct input_dev *idev = ar2->idev;
 350         u8 *data = ar2->buf[1];
 351         int channel, mode, hw_code, index;
 352
 353         channel = data[0] >> 4;
 354
 355         if (!((1 << channel) & ar2->channel_mask))
 356                 return;
 357
 358         mode = data[0] & 0x0F;
 359
 360         if (mode > ATI_REMOTE2_PC) {
 361                 dev_err(&ar2->intf[1]->dev,
 362                         "Unknown mode byte (%02x %02x %02x %02x)\n",
 363                         data[3], data[2], data[1], data[0]);
 364                 return;
 365         }
 366
 367         hw_code = data[2];
 368         if (hw_code == 0x3f) {
 369                 /*
 370                  * For some incomprehensible reason the mouse pad generates
 371                  * events which look identical to the events from the last
 372                  * pressed mode key. Naturally we don't want to generate key
 373                  * events for the mouse pad so we filter out any subsequent
 374                  * events from the same mode key.
 375                  */
 376                 if (ar2->mode == mode)
 377                         return;
 378
 379                 if (data[1] == 0)
 380                         ar2->mode = mode;
 381         }
 382
 383         if (!((1 << mode) & ar2->mode_mask))
 384                 return;
 385
 386         index = ati_remote2_lookup(hw_code);
 387         if (index < 0) {
 388                 dev_err(&ar2->intf[1]->dev,
 389                         "Unknown code byte (%02x %02x %02x %02x)\n",
 390                         data[3], data[2], data[1], data[0]);
 391                 return;
 392         }
 393
 394         switch (data[1]) {
 395         case 0: /* release */
 396                 break;
 397         case 1: /* press */
 398                 ar2->jiffies = jiffies + msecs_to_jiffies(idev->rep[REP_DELAY]);
 399                 break;
 400         case 2: /* repeat */
 401
 402                 /* No repeat for mouse buttons. */
 403                 if (ar2->keycode[mode][index] == BTN_LEFT ||
 404                     ar2->keycode[mode][index] == BTN_RIGHT)
 405                         return;
 406
 407                 if (!time_after_eq(jiffies, ar2->jiffies))
 408                         return;
 409
 410                 ar2->jiffies = jiffies + msecs_to_jiffies(idev->rep[REP_PERIOD]);
 411                 break;
 412         default:
 413                 dev_err(&ar2->intf[1]->dev,
 414                         "Unknown state byte (%02x %02x %02x %02x)\n",
 415                         data[3], data[2], data[1], data[0]);
 416                 return;
 417         }
 418
 419         input_event(idev, EV_KEY, ar2->keycode[mode][index], data[1]);
 420         input_sync(idev);
 421 }
 422
 423 static void ati_remote2_complete_mouse(struct urb *urb)
 424 {
 425         struct ati_remote2 *ar2 = urb->context;
 426         int r;
 427
 428         switch (urb->status) {
 429         case 0:
 430                 usb_mark_last_busy(ar2->udev);
 431                 ati_remote2_input_mouse(ar2);
 432                 break;
 433         case -ENOENT:
 434         case -EILSEQ:
 435         case -ECONNRESET:
 436         case -ESHUTDOWN:
 437                 dev_dbg(&ar2->intf[0]->dev,
 438                         "%s(): urb status = %d\n", __func__, urb->status);
 439                 return;
 440         default:
 441                 usb_mark_last_busy(ar2->udev);
 442                 dev_err(&ar2->intf[0]->dev,
 443                         "%s(): urb status = %d\n", __func__, urb->status);
 444         }
 445
 446         r = usb_submit_urb(urb, GFP_ATOMIC);
 447         if (r)
 448                 dev_err(&ar2->intf[0]->dev,
 449                         "%s(): usb_submit_urb() = %d\n", __func__, r);
 450 }
 451
 452 static void ati_remote2_complete_key(struct urb *urb)
 453 {
 454         struct ati_remote2 *ar2 = urb->context;
 455         int r;
 456
 457         switch (urb->status) {
 458         case 0:
 459                 usb_mark_last_busy(ar2->udev);
 460                 ati_remote2_input_key(ar2);
 461                 break;
 462         case -ENOENT:
 463         case -EILSEQ:
 464         case -ECONNRESET:
 465         case -ESHUTDOWN:
 466                 dev_dbg(&ar2->intf[1]->dev,
 467                         "%s(): urb status = %d\n", __func__, urb->status);
 468                 return;
 469         default:
 470                 usb_mark_last_busy(ar2->udev);
 471                 dev_err(&ar2->intf[1]->dev,
 472                         "%s(): urb status = %d\n", __func__, urb->status);
 473         }
 474
 475         r = usb_submit_urb(urb, GFP_ATOMIC);
 476         if (r)
 477                 dev_err(&ar2->intf[1]->dev,
 478                         "%s(): usb_submit_urb() = %d\n", __func__, r);
 479 }
 480
 481 static int ati_remote2_getkeycode(struct input_dev *idev,
 482                                   struct input_keymap_entry *ke)
 483 {
 484         struct ati_remote2 *ar2 = input_get_drvdata(idev);
 485         unsigned int mode;
 486         int offset;
 487         unsigned int index;
 488         unsigned int scancode;
 489
 490         if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
 491                 index = ke->index;
 492                 if (index >= ATI_REMOTE2_MODES *
 493                                 ARRAY_SIZE(ati_remote2_key_table))
 494                         return -EINVAL;
 495
 496                 mode = ke->index / ARRAY_SIZE(ati_remote2_key_table);
 497                 offset = ke->index % ARRAY_SIZE(ati_remote2_key_table);
 498                 scancode = (mode << 8) + ati_remote2_key_table[offset].hw_code;
 499         } else {
 500                 if (input_scancode_to_scalar(ke, &scancode))
 501                         return -EINVAL;
 502
 503                 mode = scancode >> 8;
 504                 if (mode > ATI_REMOTE2_PC)
 505                         return -EINVAL;
 506
 507                 offset = ati_remote2_lookup(scancode & 0xff);
 508                 if (offset < 0)
 509                         return -EINVAL;
 510
 511                 index = mode * ARRAY_SIZE(ati_remote2_key_table) + offset;
 512         }
 513
 514         ke->keycode = ar2->keycode[mode][offset];
 515         ke->len = sizeof(scancode);
 516         memcpy(&ke->scancode, &scancode, sizeof(scancode));
 517         ke->index = index;
 518
 519         return 0;
 520 }
 521
 522 static int ati_remote2_setkeycode(struct input_dev *idev,
 523                                   const struct input_keymap_entry *ke,
 524                                   unsigned int *old_keycode)
 525 {
 526         struct ati_remote2 *ar2 = input_get_drvdata(idev);
 527         unsigned int mode;
 528         int offset;
 529         unsigned int index;
 530         unsigned int scancode;
 531
 532         if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
 533                 if (ke->index >= ATI_REMOTE2_MODES *
 534                                 ARRAY_SIZE(ati_remote2_key_table))
 535                         return -EINVAL;
 536
 537                 mode = ke->index / ARRAY_SIZE(ati_remote2_key_table);
 538                 offset = ke->index % ARRAY_SIZE(ati_remote2_key_table);
 539         } else {
 540                 if (input_scancode_to_scalar(ke, &scancode))
 541                         return -EINVAL;
 542
 543                 mode = scancode >> 8;
 544                 if (mode > ATI_REMOTE2_PC)
 545                         return -EINVAL;
 546
 547                 offset = ati_remote2_lookup(scancode & 0xff);
 548                 if (offset < 0)
 549                         return -EINVAL;
 550         }
 551
 552         *old_keycode = ar2->keycode[mode][offset];
 553         ar2->keycode[mode][offset] = ke->keycode;
 554         __set_bit(ke->keycode, idev->keybit);
 555
 556         for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
 557                 for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
 558                         if (ar2->keycode[mode][index] == *old_keycode)
 559                                 return 0;
 560                 }
 561         }
 562
 563         __clear_bit(*old_keycode, idev->keybit);
 564
 565         return 0;
 566 }
 567
 568 static int ati_remote2_input_init(struct ati_remote2 *ar2)
 569 {
 570         struct input_dev *idev;
 571         int index, mode, retval;
 572
 573         idev = input_allocate_device();
 574         if (!idev)
 575                 return -ENOMEM;
 576
 577         ar2->idev = idev;
 578         input_set_drvdata(idev, ar2);
 579
 580         idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
 581         idev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
 582                 BIT_MASK(BTN_RIGHT);
 583         idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 584
 585         for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
 586                 for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
 587                         ar2->keycode[mode][index] = ati_remote2_key_table[index].keycode;
 588                         __set_bit(ar2->keycode[mode][index], idev->keybit);
 589                 }
 590         }
 591
 592         /* AUX1-AUX4 and PC generate the same scancode. */
 593         index = ati_remote2_lookup(0x3f);
 594         ar2->keycode[ATI_REMOTE2_AUX1][index] = KEY_PROG1;
 595         ar2->keycode[ATI_REMOTE2_AUX2][index] = KEY_PROG2;
 596         ar2->keycode[ATI_REMOTE2_AUX3][index] = KEY_PROG3;
 597         ar2->keycode[ATI_REMOTE2_AUX4][index] = KEY_PROG4;
 598         ar2->keycode[ATI_REMOTE2_PC][index] = KEY_PC;
 599         __set_bit(KEY_PROG1, idev->keybit);
 600         __set_bit(KEY_PROG2, idev->keybit);
 601         __set_bit(KEY_PROG3, idev->keybit);
 602         __set_bit(KEY_PROG4, idev->keybit);
 603         __set_bit(KEY_PC, idev->keybit);
 604
 605         idev->rep[REP_DELAY]  = 250;
 606         idev->rep[REP_PERIOD] = 33;
 607
 608         idev->open = ati_remote2_open;
 609         idev->close = ati_remote2_close;
 610
 611         idev->getkeycode = ati_remote2_getkeycode;
 612         idev->setkeycode = ati_remote2_setkeycode;
 613
 614         idev->name = ar2->name;
 615         idev->phys = ar2->phys;
 616
 617         usb_to_input_id(ar2->udev, &idev->id);
 618         idev->dev.parent = &ar2->udev->dev;
 619
 620         retval = input_register_device(idev);
 621         if (retval)
 622                 input_free_device(idev);
 623
 624         return retval;
 625 }
 626
 627 static int ati_remote2_urb_init(struct ati_remote2 *ar2)
 628 {
 629         struct usb_device *udev = ar2->udev;
 630         int i, pipe, maxp;
 631
 632         for (i = 0; i < 2; i++) {
 633                 ar2->buf[i] = usb_alloc_coherent(udev, 4, GFP_KERNEL, &ar2->buf_dma[i]);
 634                 if (!ar2->buf[i])
 635                         return -ENOMEM;
 636
 637                 ar2->urb[i] = usb_alloc_urb(0, GFP_KERNEL);
 638                 if (!ar2->urb[i])
 639                         return -ENOMEM;
 640
 641                 pipe = usb_rcvintpipe(udev, ar2->ep[i]->bEndpointAddress);
 642                 maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
 643                 maxp = maxp > 4 ? 4 : maxp;
 644
 645                 usb_fill_int_urb(ar2->urb[i], udev, pipe, ar2->buf[i], maxp,
 646                                  i ? ati_remote2_complete_key : ati_remote2_complete_mouse,
 647                                  ar2, ar2->ep[i]->bInterval);
 648                 ar2->urb[i]->transfer_dma = ar2->buf_dma[i];
 649                 ar2->urb[i]->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 650         }
 651
 652         return 0;
 653 }
 654
 655 static void ati_remote2_urb_cleanup(struct ati_remote2 *ar2)
 656 {
 657         int i;
 658
 659         for (i = 0; i < 2; i++) {
 660                 usb_free_urb(ar2->urb[i]);
 661                 usb_free_coherent(ar2->udev, 4, ar2->buf[i], ar2->buf_dma[i]);
 662         }
 663 }
 664
 665 static int ati_remote2_setup(struct ati_remote2 *ar2, unsigned int ch_mask)
 666 {
 667         int r, i, channel;
 668
 669         /*
 670          * Configure receiver to only accept input from remote "channel"
 671          *  channel == 0  -> Accept input from any remote channel
 672          *  channel == 1  -> Only accept input from remote channel 1
 673          *  channel == 2  -> Only accept input from remote channel 2
 674          *  ...
 675          *  channel == 16 -> Only accept input from remote channel 16
 676          */
 677
 678         channel = 0;
 679         for (i = 0; i < 16; i++) {
 680                 if ((1 << i) & ch_mask) {
 681                         if (!(~(1 << i) & ch_mask))
 682                                 channel = i + 1;
 683                         break;
 684                 }
 685         }
 686
 687         r = usb_control_msg(ar2->udev, usb_sndctrlpipe(ar2->udev, 0),
 688                             0x20,
 689                             USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
 690                             channel, 0x0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 691         if (r) {
 692                 dev_err(&ar2->udev->dev, "%s - failed to set channel due to error: %d\n",
 693                         __func__, r);
 694                 return r;
 695         }
 696
 697         return 0;
 698 }
 699
 700 static ssize_t ati_remote2_show_channel_mask(struct device *dev,
 701                                              struct device_attribute *attr,
 702                                              char *buf)
 703 {
 704         struct usb_device *udev = to_usb_device(dev);
 705         struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
 706         struct ati_remote2 *ar2 = usb_get_intfdata(intf);
 707
 708         return sprintf(buf, "0x%04x\n", ar2->channel_mask);
 709 }
 710
 711 static ssize_t ati_remote2_store_channel_mask(struct device *dev,
 712                                               struct device_attribute *attr,
 713                                               const char *buf, size_t count)
 714 {
 715         struct usb_device *udev = to_usb_device(dev);
 716         struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
 717         struct ati_remote2 *ar2 = usb_get_intfdata(intf);
 718         unsigned int mask;
 719         int r;
 720
 721         r = kstrtouint(buf, 0, &mask);
 722         if (r)
 723                 return r;
 724
 725         if (mask & ~ATI_REMOTE2_MAX_CHANNEL_MASK)
 726                 return -EINVAL;
 727
 728         r = usb_autopm_get_interface(ar2->intf[0]);
 729         if (r) {
 730                 dev_err(&ar2->intf[0]->dev,
 731                         "%s(): usb_autopm_get_interface() = %d\n", __func__, r);
 732                 return r;
 733         }
 734
 735         mutex_lock(&ati_remote2_mutex);
 736
 737         if (mask != ar2->channel_mask) {
 738                 r = ati_remote2_setup(ar2, mask);
 739                 if (!r)
 740                         ar2->channel_mask = mask;
 741         }
 742
 743         mutex_unlock(&ati_remote2_mutex);
 744
 745         usb_autopm_put_interface(ar2->intf[0]);
 746
 747         return r ? r : count;
 748 }
 749
 750 static ssize_t ati_remote2_show_mode_mask(struct device *dev,
 751                                           struct device_attribute *attr,
 752                                           char *buf)
 753 {
 754         struct usb_device *udev = to_usb_device(dev);
 755         struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
 756         struct ati_remote2 *ar2 = usb_get_intfdata(intf);
 757
 758         return sprintf(buf, "0x%02x\n", ar2->mode_mask);
 759 }
 760
 761 static ssize_t ati_remote2_store_mode_mask(struct device *dev,
 762                                            struct device_attribute *attr,
 763                                            const char *buf, size_t count)
 764 {
 765         struct usb_device *udev = to_usb_device(dev);
 766         struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
 767         struct ati_remote2 *ar2 = usb_get_intfdata(intf);
 768         unsigned int mask;
 769         int err;
 770
 771         err = kstrtouint(buf, 0, &mask);
 772         if (err)
 773                 return err;
 774
 775         if (mask & ~ATI_REMOTE2_MAX_MODE_MASK)
 776                 return -EINVAL;
 777
 778         ar2->mode_mask = mask;
 779
 780         return count;
 781 }
 782
 783 static DEVICE_ATTR(channel_mask, 0644, ati_remote2_show_channel_mask,
 784                    ati_remote2_store_channel_mask);
 785
 786 static DEVICE_ATTR(mode_mask, 0644, ati_remote2_show_mode_mask,
 787                    ati_remote2_store_mode_mask);
 788
 789 static struct attribute *ati_remote2_attrs[] = {
 790         &dev_attr_channel_mask.attr,
 791         &dev_attr_mode_mask.attr,
 792         NULL,
 793 };
 794
 795 static struct attribute_group ati_remote2_attr_group = {
 796         .attrs = ati_remote2_attrs,
 797 };
 798
 799 static int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id)
 800 {
 801         struct usb_device *udev = interface_to_usbdev(interface);
 802         struct usb_host_interface *alt = interface->cur_altsetting;
 803         struct ati_remote2 *ar2;
 804         int r;
 805
 806         if (alt->desc.bInterfaceNumber)
 807                 return -ENODEV;
 808
 809         ar2 = kzalloc(sizeof (struct ati_remote2), GFP_KERNEL);
 810         if (!ar2)
 811                 return -ENOMEM;
 812
 813         ar2->udev = udev;
 814
 815         /* Sanity check, first interface must have an endpoint */
 816         if (alt->desc.bNumEndpoints < 1 || !alt->endpoint) {
 817                 dev_err(&interface->dev,
 818                         "%s(): interface 0 must have an endpoint\n", __func__);
 819                 r = -ENODEV;
 820                 goto fail1;
 821         }
 822         ar2->intf[0] = interface;
 823         ar2->ep[0] = &alt->endpoint[0].desc;
 824
 825         /* Sanity check, the device must have two interfaces */
 826         ar2->intf[1] = usb_ifnum_to_if(udev, 1);
 827         if ((udev->actconfig->desc.bNumInterfaces < 2) || !ar2->intf[1]) {
 828                 dev_err(&interface->dev, "%s(): need 2 interfaces, found %d\n",
 829                         __func__, udev->actconfig->desc.bNumInterfaces);
 830                 r = -ENODEV;
 831                 goto fail1;
 832         }
 833
 834         r = usb_driver_claim_interface(&ati_remote2_driver, ar2->intf[1], ar2);
 835         if (r)
 836                 goto fail1;
 837
 838         /* Sanity check, second interface must have an endpoint */
 839         alt = ar2->intf[1]->cur_altsetting;
 840         if (alt->desc.bNumEndpoints < 1 || !alt->endpoint) {
 841                 dev_err(&interface->dev,
 842                         "%s(): interface 1 must have an endpoint\n", __func__);
 843                 r = -ENODEV;
 844                 goto fail2;
 845         }
 846         ar2->ep[1] = &alt->endpoint[0].desc;
 847
 848         r = ati_remote2_urb_init(ar2);
 849         if (r)
 850                 goto fail3;
 851
 852         ar2->channel_mask = channel_mask;
 853         ar2->mode_mask = mode_mask;
 854
 855         r = ati_remote2_setup(ar2, ar2->channel_mask);
 856         if (r)
 857                 goto fail3;
 858
 859         usb_make_path(udev, ar2->phys, sizeof(ar2->phys));
 860         strlcat(ar2->phys, "/input0", sizeof(ar2->phys));
 861
 862         strlcat(ar2->name, "ATI Remote Wonder II", sizeof(ar2->name));
 863
 864         r = sysfs_create_group(&udev->dev.kobj, &ati_remote2_attr_group);
 865         if (r)
 866                 goto fail3;
 867
 868         r = ati_remote2_input_init(ar2);
 869         if (r)
 870                 goto fail4;
 871
 872         usb_set_intfdata(interface, ar2);
 873
 874         interface->needs_remote_wakeup = 1;
 875
 876         return 0;
 877
 878  fail4:
 879         sysfs_remove_group(&udev->dev.kobj, &ati_remote2_attr_group);
 880  fail3:
 881         ati_remote2_urb_cleanup(ar2);
 882  fail2:
 883         usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);
 884  fail1:
 885         kfree(ar2);
 886
 887         return r;
 888 }
 889
 890 static void ati_remote2_disconnect(struct usb_interface *interface)
 891 {
 892         struct ati_remote2 *ar2;
 893         struct usb_host_interface *alt = interface->cur_altsetting;
 894
 895         if (alt->desc.bInterfaceNumber)
 896                 return;
 897
 898         ar2 = usb_get_intfdata(interface);
 899         usb_set_intfdata(interface, NULL);
 900
 901         input_unregister_device(ar2->idev);
 902
 903         sysfs_remove_group(&ar2->udev->dev.kobj, &ati_remote2_attr_group);
 904
 905         ati_remote2_urb_cleanup(ar2);
 906
 907         usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);
 908
 909         kfree(ar2);
 910 }
 911
 912 static int ati_remote2_suspend(struct usb_interface *interface,
 913                                pm_message_t message)
 914 {
 915         struct ati_remote2 *ar2;
 916         struct usb_host_interface *alt = interface->cur_altsetting;
 917
 918         if (alt->desc.bInterfaceNumber)
 919                 return 0;
 920
 921         ar2 = usb_get_intfdata(interface);
 922
 923         dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 924
 925         mutex_lock(&ati_remote2_mutex);
 926
 927         if (ar2->flags & ATI_REMOTE2_OPENED)
 928                 ati_remote2_kill_urbs(ar2);
 929
 930         ar2->flags |= ATI_REMOTE2_SUSPENDED;
 931
 932         mutex_unlock(&ati_remote2_mutex);
 933
 934         return 0;
 935 }
 936
 937 static int ati_remote2_resume(struct usb_interface *interface)
 938 {
 939         struct ati_remote2 *ar2;
 940         struct usb_host_interface *alt = interface->cur_altsetting;
 941         int r = 0;
 942
 943         if (alt->desc.bInterfaceNumber)
 944                 return 0;
 945
 946         ar2 = usb_get_intfdata(interface);
 947
 948         dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 949
 950         mutex_lock(&ati_remote2_mutex);
 951
 952         if (ar2->flags & ATI_REMOTE2_OPENED)
 953                 r = ati_remote2_submit_urbs(ar2);
 954
 955         if (!r)
 956                 ar2->flags &= ~ATI_REMOTE2_SUSPENDED;
 957
 958         mutex_unlock(&ati_remote2_mutex);
 959
 960         return r;
 961 }
 962
 963 static int ati_remote2_reset_resume(struct usb_interface *interface)
 964 {
 965         struct ati_remote2 *ar2;
 966         struct usb_host_interface *alt = interface->cur_altsetting;
 967         int r = 0;
 968
 969         if (alt->desc.bInterfaceNumber)
 970                 return 0;
 971
 972         ar2 = usb_get_intfdata(interface);
 973
 974         dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 975
 976         mutex_lock(&ati_remote2_mutex);
 977
 978         r = ati_remote2_setup(ar2, ar2->channel_mask);
 979         if (r)
 980                 goto out;
 981
 982         if (ar2->flags & ATI_REMOTE2_OPENED)
 983                 r = ati_remote2_submit_urbs(ar2);
 984
 985         if (!r)
 986                 ar2->flags &= ~ATI_REMOTE2_SUSPENDED;
 987
 988  out:
 989         mutex_unlock(&ati_remote2_mutex);
 990
 991         return r;
 992 }
 993
 994 static int ati_remote2_pre_reset(struct usb_interface *interface)
 995 {
 996         struct ati_remote2 *ar2;
 997         struct usb_host_interface *alt = interface->cur_altsetting;
 998
 999         if (alt->desc.bInterfaceNumber)
1000                 return 0;
1001
1002         ar2 = usb_get_intfdata(interface);
1003
1004         dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
1005
1006         mutex_lock(&ati_remote2_mutex);
1007
1008         if (ar2->flags == ATI_REMOTE2_OPENED)
1009                 ati_remote2_kill_urbs(ar2);
1010
1011         return 0;
1012 }
1013
1014 static int ati_remote2_post_reset(struct usb_interface *interface)
1015 {
1016         struct ati_remote2 *ar2;
1017         struct usb_host_interface *alt = interface->cur_altsetting;
1018         int r = 0;
1019
1020         if (alt->desc.bInterfaceNumber)
1021                 return 0;
1022
1023         ar2 = usb_get_intfdata(interface);
1024
1025         dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
1026
1027         if (ar2->flags == ATI_REMOTE2_OPENED)
1028                 r = ati_remote2_submit_urbs(ar2);
1029
1030         mutex_unlock(&ati_remote2_mutex);
1031
1032         return r;
1033 }
1034
1035 module_usb_driver(ati_remote2_driver);